Giaga is a troll who pretends to be super-religious for lulz. The account originally appeared on the 12 Year Old Boy Challenges Einstein thread about how the Big Bang was a lie made up by Stainists. This statement spawned many jokes and almost derailed the thread, but on-topicness prevailed.
For the most part, Giaga makes posts that are not trolling, but do not contribute. They are not spamming, either, as they are relevant to the topic at hand. But one thing is the same with all its posts: they are always fail.
It was later revealed through a fascinating and circuitous series of events that Giaga is, in fact, one of the better trolls the Sporum has ever known. When Giaga created a barely-coherent roleplay about a war between Jesus and Satan, involving individuals such as Saddam Hussein and Barack Obama as leaders of the "Stainist" or "Stanist" faction, there was much raeg.
Following the resultant flamewar, Giaga switched writing style and suddenly became one of the most coherent Sporumers of the modern Sporum - even going so far as to reprimand people for taking the roleplay seriously, stating that some of the religious figures involved were too obscure for a n00b like "Giaga" to have any knowledge of them and that people should have just played along.